<script>
  var a = b = c = 8;          // 为三个变量同时赋值
</script>

<script>
  var num1 = 2, num2 = '2';
  num1 += 3;
  num2 += 3;
  console.log(num1, num2);   // 输出结果为：5 "23" 
</script>
<p>
  <a href="file:///C:/Users/rise/Desktop/%E9%A6%96%E9%A1%B5/default/02.html">返回</a>
</p>